US3477811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of crucible-free zone melting crystalline rods,especially of semiconductive material
Assignee: Siemens AG
•
Filing: 1966-07-11
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Granted: 1969-11-11
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Expires: 1986-07-11
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:49
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/30; C30B13/32; C30B15/00; C30B15/08; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/91; Y10S117/911; Y10S117/912; Y10S117/917; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3159459A
Cited
US3036892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |